conjugation of AT and ER/ OR verbs in the present progressive tense. Estar conjugate chart. Estoy, Estamos, Estas, Estais, Esta, Estan. Form the present progressive you use the correct form of the auxiliary verb Estar + the verb ending in ANDO for AT verbs and IENDO for ER/IR verbs. Fill out the correct form of Estar blank and the correct form of the verb in parentheses in the second blank